feat: flip swap mechanism on sagitta — MD as primary, RST as override

Mirror of #1899 (current) and #1900 (circinus) for sagitta. Same logic,
same scripts, per-branch file set.

Changes:
- Rename docs/**/md-<stem>.md to docs/**/<stem>.md (drop md- prefix) for
  all 210 stems previously listed in docs/_swap.txt
- Rename docs/**/<stem>.rst to docs/**/rst-<stem>.rst (add rst- prefix)
  for the same 210 stems
- Repurpose docs/_swap.txt as docs/_rst_overrides.txt; initially empty
- conf.py exclude_patterns flipped: rst-*.rst excluded by default
- conf.py runtime-artifact references updated to _rst_override_state.json
  and _md_exclude.txt
- scripts/swap_sources.py imported from current (post-#1899 rewrite, with
  inverted rename direction)
- scripts/import_myst.py and tests/test_import_myst.py deleted (obsolete)
- tests/test_swap_sources.py imported from current (post-#1899 rewrite)

Side-effect: fixes the same 404 on /en/1.4/ View page source links that
#1899 fixed for /en/rolling/ and #1900 fixed for /en/1.5/.

Per-branch differences vs #1899:
- sagitta has 210 stems vs current's 254 (sagitta has no vpp pages and
  fewer current-only features; cli + installation/cloud/aws are still
  RST-only on sagitta pending the title-level fix follow-up)
- otherwise the script/conf.py/test changes are byte-identical with current

Generated by robots https://vyos.io

10 files changed, 0 insertions, 0 deletions

diff --git a/docs/operation/md-boot-options.md b/docs/operation/boot-options.md
index ea077c8a..ea077c8a 100644
--- a/docs/operation/md-boot-options.md
+++ b/docs/operation/boot-options.md
diff --git a/docs/operation/md-index.md b/docs/operation/index.md
index f4328541..f4328541 100644
--- a/docs/operation/md-index.md
+++ b/docs/operation/index.md
diff --git a/docs/operation/md-information.md b/docs/operation/information.md
index 314811ec..314811ec 100644
--- a/docs/operation/md-information.md
+++ b/docs/operation/information.md
diff --git a/docs/operation/md-password-recovery.md b/docs/operation/password-recovery.md
index 91f3d60f..91f3d60f 100644
--- a/docs/operation/md-password-recovery.md
+++ b/docs/operation/password-recovery.md
diff --git a/docs/operation/md-raid.md b/docs/operation/raid.md
index 71a6ad5e..71a6ad5e 100644
--- a/docs/operation/md-raid.md
+++ b/docs/operation/raid.md
diff --git a/docs/operation/boot-options.rst b/docs/operation/rst-boot-options.rst
index 70cdc418..70cdc418 100644
--- a/docs/operation/boot-options.rst
+++ b/docs/operation/rst-boot-options.rst
diff --git a/docs/operation/index.rst b/docs/operation/rst-index.rst
index 037c9286..037c9286 100644
--- a/docs/operation/index.rst
+++ b/docs/operation/rst-index.rst
diff --git a/docs/operation/information.rst b/docs/operation/rst-information.rst
index e32e55b4..e32e55b4 100644
--- a/docs/operation/information.rst
+++ b/docs/operation/rst-information.rst
diff --git a/docs/operation/password-recovery.rst b/docs/operation/rst-password-recovery.rst
index 59f4d7c9..59f4d7c9 100755
--- a/docs/operation/password-recovery.rst
+++ b/docs/operation/rst-password-recovery.rst
diff --git a/docs/operation/raid.rst b/docs/operation/rst-raid.rst
index 30407718..30407718 100644
--- a/docs/operation/raid.rst
+++ b/docs/operation/rst-raid.rst